Fig. 4
From: Study on the influencing factors of land desertification degree in Xilingol Grassland
Correlation coefficients between candidate evaluation factors and vegetation indices. Panel (a) presents the Pearson correlation coefficients for factors that meet normal distribution criteria, while Panel (b) displays the Spearman correlation coefficients for factors that do not satisfy normal distribution. The intensity of the correlation is represented by color, with values closer to the legend endpoints indicating stronger correlations, and those near the midpoint showing weaker relationships. Both panels highlight the varying degrees of correlation between the selected evaluation factors and the vegetation index, providing insight into the factors most strongly associated with land desertification.
